mirror of https://gitee.com/openkylin/linux.git
121 lines
2.8 KiB
C
121 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of_mdio.h>
|
|
#include <linux/phy.h>
|
|
#include <linux/usb.h>
|
|
|
|
#define USB_MARVELL_VID 0x1286
|
|
|
|
static const struct usb_device_id mvusb_mdio_table[] = {
|
|
{ USB_DEVICE(USB_MARVELL_VID, 0x1fa4) },
|
|
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(usb, mvusb_mdio_table);
|
|
|
|
enum {
|
|
MVUSB_CMD_PREAMBLE0,
|
|
MVUSB_CMD_PREAMBLE1,
|
|
MVUSB_CMD_ADDR,
|
|
MVUSB_CMD_VAL,
|
|
};
|
|
|
|
struct mvusb_mdio {
|
|
struct usb_device *udev;
|
|
struct mii_bus *mdio;
|
|
|
|
__le16 buf[4];
|
|
};
|
|
|
|
static int mvusb_mdio_read(struct mii_bus *mdio, int dev, int reg)
|
|
{
|
|
struct mvusb_mdio *mvusb = mdio->priv;
|
|
int err, alen;
|
|
|
|
if (dev & MII_ADDR_C45)
|
|
return -EOPNOTSUPP;
|
|
|
|
mvusb->buf[MVUSB_CMD_ADDR] = cpu_to_le16(0xa400 | (dev << 5) | reg);
|
|
|
|
err = usb_bulk_msg(mvusb->udev, usb_sndbulkpipe(mvusb->udev, 2),
|
|
mvusb->buf, 6, &alen, 100);
|
|
if (err)
|
|
return err;
|
|
|
|
err = usb_bulk_msg(mvusb->udev, usb_rcvbulkpipe(mvusb->udev, 6),
|
|
&mvusb->buf[MVUSB_CMD_VAL], 2, &alen, 100);
|
|
if (err)
|
|
return err;
|
|
|
|
return le16_to_cpu(mvusb->buf[MVUSB_CMD_VAL]);
|
|
}
|
|
|
|
static int mvusb_mdio_write(struct mii_bus *mdio, int dev, int reg, u16 val)
|
|
{
|
|
struct mvusb_mdio *mvusb = mdio->priv;
|
|
int alen;
|
|
|
|
if (dev & MII_ADDR_C45)
|
|
return -EOPNOTSUPP;
|
|
|
|
mvusb->buf[MVUSB_CMD_ADDR] = cpu_to_le16(0x8000 | (dev << 5) | reg);
|
|
mvusb->buf[MVUSB_CMD_VAL] = cpu_to_le16(val);
|
|
|
|
return usb_bulk_msg(mvusb->udev, usb_sndbulkpipe(mvusb->udev, 2),
|
|
mvusb->buf, 8, &alen, 100);
|
|
}
|
|
|
|
static int mvusb_mdio_probe(struct usb_interface *interface,
|
|
const struct usb_device_id *id)
|
|
{
|
|
struct device *dev = &interface->dev;
|
|
struct mvusb_mdio *mvusb;
|
|
struct mii_bus *mdio;
|
|
|
|
mdio = devm_mdiobus_alloc_size(dev, sizeof(*mvusb));
|
|
if (!mdio)
|
|
return -ENOMEM;
|
|
|
|
mvusb = mdio->priv;
|
|
mvusb->mdio = mdio;
|
|
mvusb->udev = usb_get_dev(interface_to_usbdev(interface));
|
|
|
|
/* Reversed from USB PCAPs, no idea what these mean. */
|
|
mvusb->buf[MVUSB_CMD_PREAMBLE0] = cpu_to_le16(0xe800);
|
|
mvusb->buf[MVUSB_CMD_PREAMBLE1] = cpu_to_le16(0x0001);
|
|
|
|
snprintf(mdio->id, MII_BUS_ID_SIZE, "mvusb-%s", dev_name(dev));
|
|
mdio->name = mdio->id;
|
|
mdio->parent = dev;
|
|
mdio->read = mvusb_mdio_read;
|
|
mdio->write = mvusb_mdio_write;
|
|
|
|
usb_set_intfdata(interface, mvusb);
|
|
return of_mdiobus_register(mdio, dev->of_node);
|
|
}
|
|
|
|
static void mvusb_mdio_disconnect(struct usb_interface *interface)
|
|
{
|
|
struct mvusb_mdio *mvusb = usb_get_intfdata(interface);
|
|
struct usb_device *udev = mvusb->udev;
|
|
|
|
mdiobus_unregister(mvusb->mdio);
|
|
usb_set_intfdata(interface, NULL);
|
|
usb_put_dev(udev);
|
|
}
|
|
|
|
static struct usb_driver mvusb_mdio_driver = {
|
|
.name = "mvusb_mdio",
|
|
.id_table = mvusb_mdio_table,
|
|
.probe = mvusb_mdio_probe,
|
|
.disconnect = mvusb_mdio_disconnect,
|
|
};
|
|
|
|
module_usb_driver(mvusb_mdio_driver);
|
|
|
|
MODULE_AUTHOR("Tobias Waldekranz <tobias@waldekranz.com>");
|
|
MODULE_DESCRIPTION("Marvell USB MDIO Adapter");
|
|
MODULE_LICENSE("GPL");
|